Hi, I'm new to my iphone and have had it only a few days. I just noticed today a small black bit of rubber lining poking out for a few centimeters between the metal case lining, and the screen. Is this some rubber sealing that is left over from the factory, or is it something that i should be worried about and call apple. I'm basically debating whether or not to just cut it off, and the stretched rubber will recede back into the crevice, or call apple and see if i can get a replacement.